Posterior Circulation Stroke: Coma (More Than Time) is Brain.

Background And Purpose: Contrary to anterior circulation, the legitimacy of endovascular treatment in posterior circulation stroke is still being questioned. Finding reliable prognostic factors and determining how patient selection should be done has become top priority.

Methods: Observational and retrospective study from two Portuguese hospitals, including all consecutive patients with posterior circulation occlusions who underwent thrombectomy between January 1st 2015 and December 31st 2019.

Diagnostic accuracy of Bilateral Inferior Petrosal Sinus Sampling: The Experience of a Tertiary Centre.

Purpose: To assess the accuracy of bilateral inferior petrosal sinus sampling both in the differential diagnosis of adrenocorticotrophic hormone dependent Cushing's syndrome and predicting the localization on the pituitary.

Methods: The authors evaluated all patients that undergone bilateral inferior petrosal sinus sampling in a tertiary centre, between January 1995 and March 2018. The probable diagnosis of Cushing's disease was made when the basal central/peripheral gradient was>2 and/or>3 after stimulation with corticotrophin releasing hormone.

[Reversible cerebral vasoconstriction syndrome: an important cause of stroke in the puerperium].

Reversible cerebral vasoconstriction syndrome is a rare cerebrovascular disorder characterized by cerebral arterial segmental vasoconstriction, usually spontaneously reversible. This disease can occur in the postpartum period, manifesting itself through acute neurologic symptoms, and the imaging studies play a fundamental role in its diagnosis. Although classically considered a benign and self-limiting disease, it may present less favorable courses with significant associated morbidity and mortality.

[Subocclusive transvenous approach of dural arteriovenous fistula].

Introduction: Dural arteriovenous fistulae (DAVF) are usually acquired and when presented with cortical venous drainage are associated with high risk of hemorrhage. They can be treated by arterial or venous embolization, by surgery or by the combination of both techniques. Transvenous approach induces venous sinus thrombosis increasing the risk of venous stroke and/or hemorrhage.

[Aneurysmal malformation of the vein of Galen in adults].

We present an adult male harbouring a vascular malformation, manifested by haemorrhage, which localization, arterial feeders and venous drainage, match the pattern of choroidal type vein of Galen aneurysmal malformations seen in babies, excepting the absence of anterior choroidal arteries participation. A few cases of vein of Galen aneurysmal malformations were already reported in adults, but haemorrhage was never well documented. This haemorrhage may have a pathogenesis similar to those of pial arteriovenous malformations.